Finally, every summer it seems there is something people of all ages just start doing for fun, a kind of holiday from thinking. So are you ready to join in tonight? All you need is a kitchen table and a little time to find the beat. Abc's dan harris tried it today. Reporter: If somebody from another era to hop in a time machine, land in 2013 and briefly peruse the internet, that person would undoubtedly ask, what is the deal with all of these cups? As it happens, this is a viral trend with its roots in another era, 1931. &#9834; &#9834; Reporter: That's when music ledge ends, the carter family recorded an afternoon lachen focus song called when I'm gone. Fast forward to 2009 when this british act did another version, adding something new, a rhythmic cup accompaniment. Actress anna kendrick performed it in this year's hit movie pitch perfect. What happened next surprised everybody. Kendrick released the song as a single which h the billboard top ten. Even crazier, people started doing their own versions. What started with tween girls quickly moved to babies e grandparents, even entire families around the kitchen table. So we here at "world news" decided to try an experiment. We took six tweens and matched them up with a skeptical news anchor. You got to teach the old guy how to do it. Are you lost? I'm lost. I'm getting nervous. I'm working on the basic mechanics. Mechanic? It's a cup. Reporter: It took me a while, a long while, but I finally got it. And now I fear I will never get this song out of my head. &#9834; I got a ticket for the long way around &#9834; dan harris, abc news, new

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